johnny-five/eg/led-digits-clock.js

The JavaScript Robotics and Hardware Programming Framework. Use with: Arduino (all models), Electric Imp, Beagle Bone, Intel Galileo & Edison, Linino One, Pinoccio, Raspberry Pi, Spark Core, TI Launchpad and more!

var moment = require("moment");
var five = require("../lib/johnny-five");
var board = new five.Board();

board.on("ready", function() {
  var digits = new five.Led.Digits({
    pins: {
      data: 2,
      cs: 3,
      clock: 4,
    }
  });

  setInterval(function() {
    digits.print(time());
  }, 1000);
});

function time() {
  /*
    The desired display looks something
    like these examples:

      02.25.54 P
      12.30.00 A

    moment.js doesn't have an option for
    a single letter meridiem (nor should it,
    that would be silly), so we need to
    manipulate the string a bit to so that
    it the string matches our desired display.
   */
  return moment().format("hh.mm.ssA")
    .replace(/([AP])M/, " $1");
}


// @markdown
//
// Learn More:
//
// - [JavaScript: A Digital Clock with Johnny-Five](http://bocoup.com/weblog/javascript-arduino-digital-clock-johnny-five/)
//
// @markdown